======Reset root password with GRUB======
Boot machine into GRUB loader. \\
Highlight kernel you want to boot into.\\
Press (e) to edit boot process.\\
Add a space and append 'single' to the end of the boot sequence command line.\\
Press (b) to reboot machine.\\
Machine loads into root without a password.\\
Use passwd to create a new password.\\
Then issue 'shutdown -r now' to reboot machine.